New chemical analysis of wall painting fragments from the smaller Buddha niche in Bamiyan has yielded a surprising discovery: the presence of a synthetic form of ultramarine pigment. Using portable X-ray fluorescence (pXRF) spectroscopy, researchers found that while natural lapis lazuli was abundant, certain sections of the murals used a chemically altered pigment to achieve a specific hue. This represents one of the earliest known examples of complex pigment synthesis in Central Asian art history.
The study, published in Analytical Chemistry in Cultural Heritage, suggests that 5th-century Afghan artists were experimenting with chemical precursors to enhance the brilliance of their religious art. This finding challenges the assumption that synthetic pigments were purely a later medieval innovation and points to a sophisticated tradition of alchemy and chemistry within the Buddhist monastic workshops of the Hindu Kush.